Spectra Precision ProFlex 800 Reference Manual - Manual (Page 580)

566
Query Command Library
GSA: GNSS DOP and Active Satellites
Function This command is used to output a GSA message containing
data related to DOP values and satellites used in the position
solution.
Where applicable, one response line per constellation used is
returned. In this case, the returned DOP values are the same
in all response lines.
Command Format Syntax
$PASHQ,GSA[*cc]
Response Format Syntax
$--GSA,c1,d2,d3,d4,d5,d6,d7,d8,d9,d10,d11,d12,d13,d14,f15,f16,f17*cc
Parameters
Example $PASHQ,GSA
$GNGSA,A,3,20,11,13,23,17,04,31,,,,,,1.6,0.9,1.3*21
$GNGSA,A,3,81,83,68,,,,,,,,,,1.6,0.9,1.3*2C
Parameter Description Range
“$--GSA”
Header
$GPGSA: Only GPS satellites are used.
$GLGSA: Only GLONASS sats are used.
$GNGSA: Several constellations (GPS,
SBAS, GLONASS) are used.
$GPGSA, $GLGSA,
$GNGSA
c1
Output mode:
• M: Manual
• A: Automatic
M, A
d2
Position indicator:
• 1: No position available
• 2: 2D position
• 3: 3D position
1-3
d3-d14
Satellites used in the position solution
(blank fields for unused channels)
GPS: 1-32
GLONASS: 65-96
SBAS: 33-64
GALILEO: 97-126
GIOVE-A/B: 127-128
QZSS: 193-197
f15 PDOP 0-9.9
f16 HDOP 0-9.9
f17 VDOP 0-9.9
*cc Checksum *00-*FF